Radio Remote Unit and Communications Device

ABSTRACT

A radio remote unit, including a unit body, and multiple heat dissipation fins that are disposed on a surface of the body, where an opening groove is disposed on the heat dissipation fin, and opening grooves on the multiple heat dissipation fins form a fan ventilation groove, where the fan ventilation groove is connected to ventilation channels between the heat dissipation fins, and a fan is disposed in a built-in manner in the fan ventilation groove. The fan ventilation groove formed by the opening grooves on the multiple heat dissipation fins is connected to the ventilation channels between the heat dissipation fins, and the fan is disposed, which implements that in a case in which a quantity of heat dissipation fins is unchanged, the fan performs air cooling on the radio remote unit, effectively improving a heat dissipation capability.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of International Application No.PCT/CN2013/085802, filed on Oct. 23, 2013, which claims priority toChinese Patent Application No. 201310071869.0, filed on Mar. 6, 2013,both of which are hereby incorporated by reference in their entireties.

TECHNICAL FIELD

Embodiments of the present disclosure relate to heat dissipationtechnologies, and in particular, to a radio remote unit and acommunications device.

BACKGROUND

With continuous development of communications technologies, to reduceconstruction costs of a base station system, operators are increasinglyusing a distributed base station, that is, a base station is dividedinto a building baseband unit (BBU) and a radio remote unit (RRU), wherethe RRU needs to be mounted near an antenna. Considering load bearing,wind resistance, and construction costs of an antenna pole, in thiscase, a volume and weight of the RRU should be minimized. In addition,as power of the RRU continuously increases, heat consumption of the RRUalso increases.

In the, to ensure a heat dissipation capability of an RRU, anindependent heat dissipation fan is generally added for the RRU. In thisway, a volume and mass of the RRU cannot be effectively reduced, andwhen the heat dissipation fan becomes faulty, a heat dissipation fanassembly further affects air circulation around the RRU, therebycompromising a natural heat dissipation capability of the RRU.

SUMMARY

The present disclosure provides a radio remote unit and a communicationsdevice, which are configured to improve a heat dissipation capability ona premise of ensuring a natural heat dissipation function of the radioremote unit itself.

One aspect of the present disclosure provides a radio remote unit,including a unit body, and multiple heat dissipation fins that aredisposed on a surface of the body, where an opening groove is disposedon the heat dissipation fin, and opening grooves on the multiple heatdissipation fins form a fan ventilation groove, where the fanventilation groove is connected to ventilation channels between the heatdissipation fins, and a fan is disposed in a built-in manner in the fanventilation groove.

In a first possible implementation manner of the one aspect of thepresent disclosure, a hollow fan ventilation duct is disposed at the fanventilation groove, a height of the fan ventilation duct is less than aheight of the heat dissipation fins, and air outlets are disposed on anexterior wall that is along a height direction of the fan ventilationduct, and are connected to the ventilation channels between the heatdissipation fins.

With reference to the one aspect of the present disclosure or the firstpossible implementation manner of the one aspect, in a second possibleimplementation manner, the fan is disposed at an end of the fanventilation groove.

With reference to the first possible implementation manner of the oneaspect of the present disclosure, in a third possible implementationmanner, the fan uses a blowing mode.

In a fourth possible implementation manner of the one aspect of thepresent disclosure, a shape of the fan ventilation groove is thatcross-sectional areas of N opening grooves of the fan ventilation groovegradually increase or stepwise increase along a direction that is towardthe fan, so that the fan ventilation groove evenly allocates heatdissipation airflow, where N is a quantity of the heat dissipation fins.

In a fifth possible implementation manner of the one aspect of thepresent disclosure, a flow direction of the fan is perpendicular to orparallel with the surface of the body.

With reference to the fifth possible implementation manner of the oneaspect of the present disclosure, in a sixth possible implementationmanner of the one aspect of the present disclosure, in a state in whichthe flow direction of the fan is parallel with the surface of the body,the fan is disposed in the fan ventilation groove and away from thesurface of the body.

In a seventh possible implementation manner of the one aspect of thepresent disclosure, the multiple heat dissipation fins are straight linesegments parallel with each other or are of a curvilinear shape.

With reference to the foregoing possible implementation manners of theone aspect of the present disclosure, in an eighth possibleimplementation manner of the one aspect, the fan is a blade-rotatingfan, or an air velocity generation apparatus that is configured togenerate heat dissipation airflow.

Another aspect of the present disclosure provides a communicationsdevice, including the radio remote unit in the foregoing possibleimplementation manners, and further including a building baseband unitand an antenna, where the building baseband unit is connected to theradio remote unit, and the radio remote unit is connected to theantenna.

According to the radio remote unit provided in the embodiments, anopening groove is disposed on a heat dissipation fin, and openinggrooves on multiple heat dissipation fins form a fan ventilation groove,where the fan ventilation groove is connected to ventilation channelsbetween the heat dissipation fins; and a fan is disposed in a built-inmanner in the fan ventilation groove, which implements that in a case inwhich a quantity of heat dissipation fins is unchanged, the fan performsair cooling on the radio remote unit, effectively improving a heatdissipation capability. Meanwhile, a consideration is given to a naturalheat dissipation capability of the radio remote unit itself, so thatwhen the fan becomes faulty, natural airflow may still pass through theventilation channels between the heat dissipation fins, and the naturalheat dissipation capability of the radio remote unit is ensured. Inaddition, it is not required to increase a surface area of the radioremote unit, thereby reducing manufacturing costs of the radio remoteunit and a requirement on load bearing, wind resistance and otherfactors of an antenna pole for bearing the radio remote unit.

BRIEF DESCRIPTION OF DRAWINGS

To describe the technical solutions in the embodiments of the presentdisclosure more clearly, the following briefly introduces theaccompanying drawings required for describing the embodiments. Theaccompanying drawings in the following description show some embodimentsof the present disclosure, and a person of ordinary skill in the art maystill derive other drawings from these accompanying drawings withoutcreative efforts.

FIG. 1 is a schematic diagram of a stereoscopic structure of a firstradio remote unit according to an embodiment of the present disclosure.

FIG. 2 is a front view of a structure of a second radio remote unitaccording to an embodiment of the present disclosure.

FIG. 3 is a schematic structural diagram of a fan ventilation duct in aradio remote unit according to an embodiment of the present disclosure.

FIG. 4 is a front view of a structure of a third radio remote unitaccording to an embodiment of the present disclosure.

FIG. 5 is a front view of a structure of a fourth radio remote unitaccording to an embodiment of the present disclosure.

FIG. 6 is a side view of a structure of a fourth radio remote unitaccording to an embodiment of the present disclosure.

FIG. 7 is a front view of a structure of a fifth radio remote unitaccording to an embodiment of the present disclosure.

FIG. 8 is a schematic structural diagram of a communications deviceaccording to an embodiment of the present disclosure.

DESCRIPTION OF EMBODIMENTS

To make the objectives, technical solutions, and advantages of theembodiments of the present disclosure clearer, the following clearlydescribes the technical solutions in the embodiments of the presentdisclosure with reference to the accompanying drawings in theembodiments of the present disclosure. The described embodiments aresome but not all of the embodiments of the present disclosure. All otherembodiments obtained by a person of ordinary skill in the art based onthe embodiments of the present disclosure without creative efforts shallfall within the protection scope of the present disclosure.

FIG. 1 is a schematic diagram of a stereoscopic structure of a firstradio remote unit according to an embodiment of the present disclosure.As shown in FIG. 1, the RRU includes a unit body 10, and multiple heatdissipation fins 11 that are disposed on a surface of the body, where anopening groove is disposed on the heat dissipation fin 11, and openinggrooves on the multiple heat dissipation fins 11 form a fan ventilationgroove 12, where the fan ventilation groove 12 is connected toventilation channels between the heat dissipation fins 11; and a fan 13is disposed in a built-in manner in the fan ventilation groove 12.

As shown in FIG. 1, a flow direction of the fan 13 is perpendicular tothe surface of the body on which the heat dissipation fins are disposed.The fan 13 may be in a suction mode, or may be in a blowing mode. InFIG. 1, the multiple heat dissipation fins 11 and the fan 13 aredisposed on only one side of the RRU. The foregoing structure may bedisposed on multiple surfaces of the RRU.

After the fan 13 generates heat dissipation airflow, the heatdissipation airflow separately enters the ventilation channels betweenthe heat dissipation fins 11 by using the fan ventilation groove 12. Inaddition, because of a buoyant force of hot air itself, natural airflowalso passes upward, in a height direction, through the ventilationchannels between the heat dissipation fins 11.

According to the RRU provided in this embodiment, an opening groove isdisposed on a heat dissipation fin, and opening grooves on multiple heatdissipation fins form a fan ventilation groove, where the fanventilation groove is connected to ventilation channels between the heatdissipation fins; and a fan is disposed in a built-in manner in the fanventilation groove, which implements that in a case in which a quantityof heat dissipation fins is unchanged, the fan performs air cooling onthe RRU, effectively improving a heat dissipation capability. Meanwhile,a consideration is given to a natural heat dissipation capability of theRRU itself, so that when the fan becomes faulty, natural airflow maystill pass through the ventilation channels between the heat dissipationfins, and the natural heat dissipation capability of the RRU is ensured.In addition, it is not required to increase a surface area of the RRU,thereby reducing manufacturing costs of the RRU and a requirement onload bearing, wind resistance and other factors of an antenna pole forbearing the RRU.

Further, a shape of the fan ventilation groove 12 is preferably thatcross-sectional areas of N opening grooves of the fan ventilation groove12 gradually increase or stepwise increase along a direction that istoward the fan 13, so that the fan ventilation groove evenly allocatesheat dissipation airflow, that is, air volumes that pass through airoutlets 141 (see FIG. 3) are even. In addition, N is a quantity of heatdissipation fins. FIG. 2 is a front view of a structure of a secondradio remote unit according to an embodiment of the present disclosure.Referring to FIG. 2, the shape of the fan ventilation groove 12 is thatthe cross-sectional areas of the N opening grooves of the fanventilation groove 12 gradually increase or stepwise increase along adirection that is toward the fan 13. For the fan 13 in FIG. 1 and FIG.2, the suction mode or the blowing mode may be used, and the multipleheat dissipation fins 11 are straight line segments parallel with eachother.

Further, a hollow fan ventilation duct may be disposed at the fanventilation groove 12 in FIG. 2, where a height of the fan ventilationduct 12 is less than a height of the heat dissipation fins 11, so thatnatural heat dissipation airflow passes through a gap formed by a heightdifference between the fan ventilation duct 12 and the heat dissipationfin 11, so as to improve a heat dissipation capability. FIG. 3 is aschematic structural diagram of a fan ventilation duct in a radio remoteunit according to an embodiment of the present disclosure. As shown inFIG. 3, air outlets 141 are disposed on an exterior wall that is along aheight direction of the fan ventilation duct 14, that is, multiple airoutlets 141 are disposed on an upper side in the height direction of thefan ventilation duct 14, and the air outlets 141 of the fan ventilationduct 14 are connected to the ventilation channels between the heatdissipation fins. An end of the fan ventilation duct 14 is connected tothe fan 13. The fan ventilation duct 14 and the fan 13 may be fastenedtogether, or may be separately fastened on the surface of the unit body.A shape of the fan ventilation duct 14 in FIG. 3 is that thecross-sectional areas toward the fan 13 stepwise increase. andalternatively, the shape of the fan ventilation duct 14 may be thatcross-sectional areas toward the fan 13 gradually increase. That thecross-sectional areas toward the fan 13 stepwise increase or graduallyincrease may ensure that air volumes that pass through the air outlets141 are even.

FIG. 4 is a front view of a structure of a third radio remote unitaccording to an embodiment of the present disclosure. Referring to FIG.4, a hollow fan ventilation duct 14 is disposed at the fan ventilationgroove 12 in FIG. 1, so that heat dissipation airflow generated by thefan 13 passes through the hollow fan ventilation duct 14. A height ofthe fan ventilation duct 14 is less than a height of the heatdissipation fins 11, so as to form a gap. In this way, heat dissipationairflow in ventilation channels between lower-side heat dissipation fins11 of the fan ventilation duct 14 may pass through the gap and flow toventilation channels between upper-side heat dissipation fins 11, whichensures a natural heat dissipation function. In addition, air outlets141 are disposed on an exterior wall that is along a height direction ofthe fan ventilation duct 14, and are connected to the ventilationchannels between the heat dissipation fins 11. It should be noted that,resistance matching is performed by adjusting shapes, sizes, andpositions of the air outlets 141, so as to ensure that air volumes ofthe ventilation channels from left to right that are between the heatdissipation fins 11 and connected to the air outlets 141 are even.Compared with that air outlets are disposed on both sides, powerconsumption of the fan 13 is lower in the case that the air outlets 141are disposed only on the exterior wall that is along the heightdirection. Heat dissipation airflow generated by the fan 13 in theblowing mode passes through the air outlets 141 by using the fanventilation duct 14 and finally passes through the ventilation channelsbetween the heat dissipation fins 11, so as to perform heat dissipation,by means of air cooling, on the unit body. In addition, the fan 13 isdisposed at an end of the fan ventilation groove 12.

FIG. 5 is a front view of a structure of a fourth radio remote unitaccording to an embodiment of the present disclosure. FIG. 6 is a sideview of a structure of a fourth radio remote unit according to anembodiment of the present disclosure. Referring to FIG. 5 and FIG. 6, ina state in which the flow direction of the fan 13 is parallel with thesurface of the body, the fan 13 is disposed in the fan ventilationgroove 12 and away from the surface of the body. In addition, the fan 13uses the blowing mode.

Referring to FIG. 6, a gap exists between the fan 13 and the unit body10, and natural airflow between the heat dissipation fins 11 may flow byusing the gap to ensure a natural heat dissipation function.

Further, in a state in which the flow direction of the fan is parallelwith the surface of the body, FIG. 7 is a front view of a structure of afifth radio remote unit according to an embodiment of the presentdisclosure. Similar to the fan 13 in FIG. 6, referring to FIG. 7, thefan 13 is disposed in the fan ventilation groove 12 and away from thesurface of the body. The multiple heat dissipation fins 11 are of acurvilinear shape.

In a case in which heat dissipation is performed completely by means offorced air cooling, as shown in FIG. 7, the heat dissipation fins 11 mayuse a curved surface, where the curved surface of the heat dissipation11 is streamline and meets a requirement of aerodynamics, so that in aforced air cooling state, the heat dissipation airflow generated by thefan 13 in the blowing mode flows more smoothly, and a heat dissipationeffect is improved. Alternatively, parallel linear heat dissipation fins11 are disposed more densely, a heat dissipation area is increased bydisposing dense heat dissipation fins 11, and meanwhile, the fan 13 usesthe blowing mode.

In addition, in the foregoing embodiments, the fan may be ablade-rotating fan, or an air velocity generation apparatus that isconfigured to generate heat dissipation airflow. The air velocitygeneration apparatus may be a piezoelectric fan, a vibration fan, or thelike. It should be noted that a quantity of fans is not limited in theforegoing embodiments.

FIG. 8 is a schematic structural diagram of a communications deviceaccording to an embodiment of the present disclosure. Referring to FIG.8, the communications device includes a radio remote unit 21, andfurther includes a building baseband unit 20 and an antenna 22.

The radio remote unit 21 may use the structures shown in FIG. 1 to FIG.7, and correspondingly, may execute the technical solutions in theforegoing embodiments of the present disclosure.

As shown in FIG. 8, the building baseband unit 20 is connected to theradio remote unit 21, and the radio remote unit 21 is connected to theantenna 22.

The building baseband unit (BBU) 20 may be connected to the radio remoteunit 21 by using an optical fiber. The building baseband unit 20 isconfigured to perform baseband processing on a signal to be sent by thecommunications device, and then the radio remote unit 21 performsradio-frequency signal processing on a signal on which basebandprocessing has been performed, and the signal is sent by using theantenna 22. Alternatively, the radio remote unit 21 performsradio-frequency signal processing on a signal received by the antenna22, and after the building baseband unit 20 performs baseband processingon the signal on which radio-frequency signal processing has beenperformed, the signal is subsequently transmitted. Generally, thebuilding baseband unit 20 may be connected to multiple radio remoteunits 21. Correspondingly, a quantity of antennas 22 is corresponding tothe radio remote unit 21.

Finally, it should be noted that the foregoing embodiments are merelyintended for describing the technical solutions of the presentdisclosure, but not for limiting the present disclosure. Although thepresent disclosure is described in detail with reference to theforegoing embodiments, persons of ordinary skill in the art shouldunderstand that they may still make modifications to the technicalsolutions described in the foregoing embodiments or make equivalentreplacements to some or all technical features thereof, withoutdeparting from the scope of the technical solutions of the embodimentsof the present disclosure.

What is claimed is:
 1. A radio remote unit, comprising: a unit body; andmultiple heat dissipation fins disposed on a surface of the body,wherein an opening groove is disposed on the multiple heat dissipationfins, wherein the opening grooves on the multiple heat dissipation finsform a fan ventilation groove, wherein the fan ventilation groove isconnected to ventilation channels between the multiple heat dissipationfins, and wherein a fan is disposed in a built-in manner in the fanventilation groove.
 2. The radio remote unit according to claim 1,wherein a hollow fan ventilation duct is disposed at the fan ventilationgroove, wherein a height of the fan ventilation duct is less than aheight of the multiple heat dissipation fins, wherein air outlets aredisposed on an exterior wall along a height direction of the fanventilation duct, and wherein the air outlets are connected to theventilation channels between the multiple heat dissipation fins.
 3. Theradio remote unit according to claim 1, wherein the fan is disposed atan end of the fan ventilation groove.
 4. The radio remote unit accordingto claim 3, wherein the fan uses a blowing mode.
 5. The radio remoteunit according to claim 1, wherein cross-sectional areas of N openinggrooves of the fan ventilation groove gradually increase along adirection that is toward the fan, so that the fan ventilation grooveevenly allocates heat dissipation airflow, wherein N is a quantity ofthe multiple heat dissipation fins.
 6. The radio remote unit accordingto claim 1, wherein cross-sectional areas of N opening grooves of thefan ventilation groove stepwise increase along a direction that istoward the fan, so that the fan ventilation groove evenly allocates heatdissipation airflow, wherein N is a quantity of the multiple heatdissipation fins.
 7. The radio remote unit according to claim 1, whereina flow direction of the fan is perpendicular to the surface of the body.8. The radio remote unit according to claim 1, wherein a flow directionof the fan is parallel with the surface of the body.
 9. The radio remoteunit according to claim 8, wherein the fan is disposed in the fanventilation groove and away from the surface of the body.
 10. The radioremote unit according to claim 1, wherein the multiple heat dissipationfins are straight line segments parallel with each other or are of acurvilinear shape.
 11. The radio remote unit according to claim 1,wherein the fan is a blade-rotating fan, or an air velocity generationapparatus configured to generate heat dissipation airflow.
 12. Acommunications device, comprising: a radio remote unit, wherein theradio remote unit comprises: a unit body; and multiple heat dissipationfins that are disposed on a surface of the body, wherein an openinggroove is disposed on the multiple heat dissipation fins, whereinopening grooves on the multiple heat dissipation fins form a fanventilation groove, wherein the fan ventilation groove is connected toventilation channels between the multiple heat dissipation fins, andwherein a fan is disposed in a built-in manner in the fan ventilationgroove; a building baseband unit, wherein the building baseband unit isconnected to the radio remote unit; and an antenna, wherein the antennais connected to the radio remote unit.
 13. The radio remote unitaccording to claim 12, wherein a hollow fan ventilation duct is disposedat the fan ventilation groove, wherein a height of the fan ventilationduct is less than a height of the multiple heat dissipation fins,wherein air outlets are disposed on an exterior wall along a heightdirection of the fan ventilation duct, and wherein the air outlets areconnected to the ventilation channels between the multiple heatdissipation fins.
 14. The radio remote unit according to claim 12,wherein the fan is disposed at an end of the fan ventilation groove. 15.The radio remote unit according to claim 14, wherein the fan uses ablowing mode.
 16. The radio remote unit according to claim 12, whereincross-sectional areas of N opening grooves of the fan ventilation groovegradually increase or stepwise increase along a direction that is towardthe fan, so that the fan ventilation groove evenly allocates heatdissipation airflow, wherein N is a quantity of the multiple heatdissipation fins.
 17. The radio remote unit according to claim 12,wherein a flow direction of the fan is perpendicular to or parallel withthe surface of the body.
 18. The radio remote unit according to claim17, wherein when the flow direction of the fan is parallel with thesurface of the body, the fan is disposed in the fan ventilation grooveand away from the surface of the body.
 19. The radio remote unitaccording to claim 12, wherein the multiple heat dissipation fins arestraight line segments parallel with each other or are of a curvilinearshape.
 20. The radio remote unit according to claim 12, wherein the fanis a blade-rotating fan, or an air velocity generation apparatusconfigured to generate heat dissipation airflow.